diff -ru mysql-4.0.21.orig/client/client_priv.h mysql-4.0.21/client/client_priv.h
--- mysql-4.0.21.orig/client/client_priv.h	2004-09-07 07:29:40.000000000 +0900
+++ mysql-4.0.21/client/client_priv.h	2004-10-03 21:13:18.000000000 +0900
@@ -38,4 +38,5 @@
                OPT_SSL_KEY, OPT_SSL_CERT, OPT_SSL_CA, OPT_SSL_CAPATH,
                OPT_SSL_CIPHER, OPT_SHUTDOWN_TIMEOUT, OPT_LOCAL_INFILE,
 	       OPT_DELETE_MASTER_LOGS,
-               OPT_PROMPT, OPT_IGN_LINES,OPT_TRANSACTION, OPT_FRM };
+               OPT_PROMPT, OPT_IGN_LINES,OPT_TRANSACTION, OPT_FRM
+	       , OPT_HEXBLOB};
diff -ru mysql-4.0.21.orig/client/mysqldump.c mysql-4.0.21/client/mysqldump.c
--- mysql-4.0.21.orig/client/mysqldump.c	2004-09-07 07:29:39.000000000 +0900
+++ mysql-4.0.21/client/mysqldump.c	2004-10-03 21:27:21.000000000 +0900
@@ -78,7 +78,7 @@
   opt_alldbs=0,opt_create_db=0,opt_first_slave=0,
   opt_autocommit=0,opt_master_data,opt_disable_keys=0,opt_xml=0,
   opt_delete_master_logs=0, tty_password=0,
-  opt_single_transaction=0, opt_comments= 0;
+  opt_single_transaction=0, opt_comments= 0, opt_hex=0;
 static ulong opt_max_allowed_packet, opt_net_buffer_length;
 static MYSQL  mysql_connection,*sock=0;
 static char  insert_pat[12 * 1024],*opt_password=0,*current_user=0,
@@ -248,6 +248,8 @@
   {"comments", 'i', "Write additional information.",
    (gptr*) &opt_comments, (gptr*) &opt_comments, 0, GET_BOOL, NO_ARG,
    1, 0, 0, 0, 0, 0},
+  {"hex-blob", OPT_HEXBLOB, "HEXdump BLOB data. this mode does not work with extended-insert.",
+   (gptr*) &opt_hex, (gptr*) &opt_hex, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   {0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
 };
 
@@ -1180,6 +1182,22 @@
 	      if (opt_xml)
 		print_quoted_xml(md_result_file, field->name, row[i],
 				 lengths[i]);
+	      else if (opt_hex && (field->type == FIELD_TYPE_BLOB
+				   || FIELD_TYPE_LONG_BLOB == field->type
+				   || FIELD_TYPE_MEDIUM_BLOB == field->type
+				   || FIELD_TYPE_TINY_BLOB == field->type
+				   )
+		       )
+	      { /* sakaik got this idea. */
+                ulong counter;
+                char xx[4];
+                unsigned char *ptr = row[i];
+                fputs("0x", md_result_file);
+                for (counter = 0; counter < lengths[i]; counter++) {
+                  sprintf(xx, "%02X", ptr[counter]);
+                  fputs(xx, md_result_file);
+                }
+	      }
 	      else
 		unescape(md_result_file, row[i], lengths[i]);
 	    }